Hydraulic air-pump.



Patented Oct. 24, I899.

G. J. HABERMANN. HYDRAULIC AIR PUMP.

(Application filed June 10, 1898.)

3 Sheets-Sheet no Model.)

I'NVENTEI'FJ M HTTY fIi-TEET Patentedflct. 24, I899. G. J. H'ABERMANNL HYDRAULIC AIR PUMP.

(Apphcat on filed June 10 1898) 3 Sheets-Sheet 2,

(No Model.)

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'GEORGE J. HABERMANN, OF CLEVELAND, OHIO.

HYDRAULIC AIR-=PUM P.

SPECIFICATION forming part of Letters Patent No. 635,478, dated October 24, 1899.

Application filed J'une10,1898- Serial No. 688,139. (No model.)

T0 to whom it may concern:

Beit known that I, GEORGE J. HABERMANN, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Hydraulic Air- Pumps; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to hydraulic air-pumps of the style in which hydraulic pressure is directly employed to compress air, all substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is avertical sectional elevation of myimproved pump, showing the valve-shifting mechanism in position as it appears when the body of the pump has been exhausted of water and is in readiness to fill. Fig. 2 is a reduced view of the valve-shifting mechanism in reverse position to that shown in Fig. 1. Fig. 3 is a plan View of the pump with the body of the casing removed. Fig. 4 is a sectional plan of the valve-casing and the valve and mechanism connected therewith and of the piston and chamber on line 4 4, Fig. 6. Fig. 5 is an elevation of the valve reversing mechanism with the valve in same position as in Fig. 4. Fig. 6 is a cross-sectional elevation corresponding to line 6 6, Fig. 4. Fig. '7 is a cross-sectional elevation corresponding to line 7 7, Fig. 4, with the piston down; and Fig. 8 is a like elevation to Fig. 6, with the piston up, as hereinafter described.

A represents the base or bottom of the pump, and B the body or chamber, fixed upon the base and sealed water-tight at the joint. The base has water passages or ducts, as will hereinafter appear, and the body incloses all the operative parts, which are supported on the base within the body. The body preferably has a dome b at one end to afford more room for the float C than it would otherwise have in a body of this general depth, and the dome is surmounted with the air-valve mechanism. This mechanism comprises air-inlet valve b in inlet-duct b and outlet-valve 12 No special novelty is claimed for these constructions, and they may be varied at pleasure. The outlet-valve acts on the principle of a rubber nipple, closing automatically when internal pressure is relieved.

The float O is designed to control the valve-actuating mechanism, whereby water is caused to enter into or discharge from the pump-body, according to the position of said parts. Said float is pivotally supported on the outer extremity of arm D, and in order that it may always hold a given position in its up and down movements and avoid the necessity of guides to keep itin a right working relation I make the bottom thereof flat, so as to produce a float substantially semispherical in form, and attach it to the arm D centrally at its bottom. On either side of the pivot on arm D are lugs d and (1, respectively operating to confine the float to a central position, Whether it be up, as in Fig. 2, or down, as in Fig. 1.

The float-arm D is 'rigid with a segment E, pivoted at its .middle on post F and adapted to swing from side to side on its pivot as itis moved either way by float D. In this swing or rotation segmentE encounters the weighted arm G, which also is pivoted on post F above segment E and has a weight g on its outer extremity. The extremities of segment E engage arm G and carry it to the vertical center about its pivot from either side, according as the float is rising or falling, and the instant the said arm passes the vertical center it drops to the free side as far as it can go, as-

presumably has occurred in Fig. 1. In this fall to either side, and the operation is the same in both directions, the valve K is re versed one way to open the inlet-passage and the other way to open the outlet-passage from the pump. To effect these reversals, the arm Gis provided With what resembles a fork 11aving two prongs or fingers 2 and 3. These fingers project from opposite sides of the arm above its pivot-point 4 and from their shoulders extend downward and inward somewhat to a distance below said pivot, where they in turn engage the valve-controlling lever J, pivoted on pin 4, the same axis as arm G. The short end of lever J is pivoted on valve K centrally between its ends, and the longer end of said lever below said pivot has a stop projection 5, working in a slot or opening in post F and serving to limit the throw of the lever. The fingers 2 and 3 engage the lever on opposite sides alternately, first one and then the other, communicating action from the weighted arm G to the valve K to shift the same. Thus the float-arm D actuates segment E, and this actuates arm G, which in turn actuates valve K through fingers or projections 2 and 3 and swinging lever J. The stop or pin 5 on lever J works within fixed limits and operates also to limit the drop of weighted arm G to either side.

The valve K is dual in character, being constructed to control two separate passages, a supply or inlet passage and an exhaust or outlet passage. As seen in Fig. 7,1ine 7 7, Fig. 4, the supply-passage is open, as seen also in Fig. 6. In this case the piston L and the valve M are down in their casing N and the water under pressure, presumably from the main, is entering through passage 6 to fill the pump. The pressure-water therefore enters through passage a in base A. Meantime there is room also for the pressure-water to pass valve K through passage 7 to the space over piston L and force it down, as has occurred in Fig. 7. This, however, still leaves ducts 6 open, as seen in said figure. Of course this condition will continue unchanged and the water-pressure will be exerted in the chamber within casing 13 until the valve K is reversed, and this reversal cannot occur until the float D reaches the limit of its upward movement. Vhen this occurs and the intermediate mechanism to valve K operates, the reversal of said valve is instantaneous,and now the piston L and valve M are carried to open the exhaust-ports, as in Fig. 8. The water-pressure through ducts 6 is now out oif and the exhaust through exit 10, Fig 8, is begun.

The exit-duct 11, Figs. 4C and 8, from above piston L,past valve K,exhausts the water from over said piston, while the water from within the chamber of the pump flows out beneath valve M, Fig. 8. \Vhen the valve is in the reversed position and the exhaust through exit-passage 11 over piston L is opened,the water,which still enters through passage 6,raises said piston and closes the valve M against the passage of the water into the chamber, as seen in Fig. 8.

In operation the chamber 15 fills with air through valve Z) when the water recedes in said chamber, and the air is compressed and forced out through valve 11 when the water rises. All the operating mechanism is therefore submerged when the chamber is filled with water; but the casing N affords protection to the valves K and M and piston L.

In some pumps of this general character there is difliculty because the operating mechanism is liable to center and stop there; but this is impossible here, because the float will invariably carry the weight across the center and then itis compelled to act. Hence, also, the valve K shuts and opens at once and the weighted arm does all the work-that is, there is no opening of the valve by the float and none till the weight acts of itself.

What I claim is- 1. In a hydraulic air-pump, a valve K con= structed to slide longitudinally in its seat and to control both the inlet and the outlet passages to the piston-chamber, a lever J pivoted between its ends on pivot-pin 4 and connected with said valve at its upper end, and having a stop 5 at its lower end to limit its movement, a swinging arm G pivoted on the pin 4 and having a weight at its top and fingers 2 and 3 at its lower end arranged to alternately engage the lower end of the lever J below its pivot and thus throw the valve K back and forth, and means to tilt the lever G to opposite sides of its pivot, substantially as described.

2. The valve K constructed to slide in its seat and to control both the inlet and the outlet passages to the piston-chamber, a level-J pivoted between its ends and mechanically connected with said valve at its upper end, a weighted swinging arm G pivoted on the same center as the said lever J and having a pair of fingers at its bottom and sides with their lower extremities in position to strike said lever below its pivot-point and thus reverse valve K, and hydraulic-actuated means to tilt the arm G comprising float C, lever D connected therewith and projections on said lever to strike opposite sides of said arm, in combination with the pump-casing N and a combined piston L and valve M in said casing controlling the entrance and discharge of the water to and from the chamber B, substantially as described.

IVitness my hand to the foregoing specification this 17th day of May, 1898.

GEORGE J. IIABERMANN.

Witnesses:

II. E. MUDRA, R. B. Mosnn. 

